GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

DEFINITION: A faulty internal transfer case component that causes a popping noise in the transfer case.

Review the Symptoms - Transfer Case and perform the necessary inspections.

Chain jump

    â€¢ Replace the chain and sprockets. Refer to Transfer Case Disassemble and Transfer Case Assemble .
    â€¢ Replace the shaft bearings. Refer to Transfer Case Disassemble and Transfer Case Assemble .
    â€¢ Inspect for damaged components caused by metal debris. Refer to Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection and Front Output Shaft and Input Shaft Cleaning and Inspection .